199011225 has 96 divisors (see below), whose sum is σ = 402831360. Its totient is φ = 84672000.

The previous prime is 199011223. The next prime is 199011229. The reversal of 199011225 is 522110991.

199011225 is a nontrivial binomial coefficient, being equal to C(19951, 2).

It is not a de Polignac number, because 199011225 - 2¹ = 199011223 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 199011192 and 199011201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199011223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 708085 + ... + 708365.

It is an arithmetic number, because the mean of its divisors is an integer number (4196160).

Almost surely, 2^199011225 is an apocalyptic number.

199011225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

199011225 is the 19950-th triangular number.

It is an amenable number.

199011225 is an abundant number, since it is smaller than the sum of its proper divisors (203820135).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199011225 is a wasteful number, since it uses less digits than its factorization.

199011225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391 (or 386 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 30.

The square root of 199011225 is about 14107.1338336318. The cubic root of 199011225 is about 583.8382231963.

The spelling of 199011225 in words is "one hundred ninety-nine million, eleven thousand, two hundred twenty-five".